Rotary table



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UNITED STATES PATENT oFFICE.

EDWIN W. GOESEE AND WILLIAM D. DAVIDSON F Los ANGELES, CALIFORNIA, As-

SIGNOBS, IBY MESNE ASSIGNMENTS, TO EMSCO DERRICK & EQUIPMENT COMPANY, 0F LOS ANGELES, CALIFORNIA, A CORPORATION OF CALIFORNIA.

no 'rAnY TABLE'.

` Application illed March 18, 1924. Serial No. 698,895.

This invention relates to rotary well drilling equipment and relates particularly to the construction of the rotary machine commonly termed rotary table.

The rotar table as now employed, provides a base having a vertical opening therethrough. On this base is mounted a circular rotary member or table proper which has a central opening and revolves in alignment with the opening through the base. Between the table and base, it is customary to employ some tye -of roller bearing so that friction may bearing being preferably in the form of conical steel rollers set in annular races which are mounted concentric with the open- "ings through the table and the base. In rotary 'drillin a cementing mixture in the form of a t in mud is forced downwardly 2 through the string of drill pipe which the rotary machine is arranged t0 drive. It often occurs that this rotar mud and various other muddy mixtures romthe well are split' over the rotary machine, such materials entering into the bearing and causing a rapid wear therein.

It is an object of the invention to provide a rotary table in which the bearing elements are well protected from entrance of abrasive materials. The object is attainedl partly in the use of ahold down ring having a continuous downwardly extending cylindrical apron which covers the opening of the space between the bearing base and the table through which` foreign substances ordinarily enter the bearing; and through the use.of a.

cylindrical projection which extends downwardly from the table across the inner face of the bearing and across the inner face of the opening through the base; thus substantially closing both the inner and outer openings of the bearingspace so that mud may not enter into the bearing.

A further object of the invention is to provide a means for centralizing the table with the base and forming bearing surfaces betweemthe centralized members; and in addition thereto incorporating improved means for lubricating these bearing surfaces.

5 The es ecial advantages 'of the invention and urther objects thereof will be made evident hereinafter.

Referring to the drawings which are for illustrative purposes only,

e kept at a minimum, this i Fig. 1 is a partially sectioned side elevatlon of a rotary machine embodying thefeatures of the invention.

Fig. 2 is an external elevation ofthe for- I 'ardl end of the rotary machine shown in Fig. 3 isa section taken as indicated by the line 3-3 of Fig. 1.

Inthe drawings 11 represents a base from which operate between the -bearing race 16 and an upper bearing race 18 whichis'carried in an annular channel 19 in the lower face of arotry table 215; The table 21 is equipped with bevel gear teeth 22 whereby the table mayv be rotated from a bevel pinion 23 mounted on a drive shaft 24 which extends through bearings 25 and has a sprocket 26 or other drlve means associated t erewith. i i

The rotary table 21 is equipped with a centralized square opening 27, the lower portionrof which opening 2T is 2defined bv a downwardly extending cylindrical iange or wall 28 having an external face 29 which forms a close running fit withy the bore 13 of the base and the inner, circular face 31 of the race 16. Directly beneath the flange 32 of the table 21 which carries the bevel gear teeth 22, is turned a groove 33, thus forming at Athe lower edge of this groove a shoulder 34 which is engaged by the inwardly turned lip 36 of the hold down ring 37 which consists of a air of semi-cylindri;al cooperating mem ers 39 and 40 which, when bolted together as vindicated at 41`in Figs. 2 and 3 forms a -continuous cylindrical apron 43, Fig.` 1, extending downwardly over the outer face 44 Jof the table 21 and over thev outer opening of the bearing space 45 between the base 11 and the table 21, and overlappingthe upper edge 46 of the base 11 so that any materials comingvin contact with they outer face of the hold down ring will be directed past the outer opening 'of the space 45 and will therefore prevent entrance of foreign materials into the annularbearing between the base 11 and the table21.

The cylindrical ange 28 which extends .f said table and said bracket opposing said f primary axialbearing; and means for formlnga radial bearingvbetween said table and said bracket, said radial bearing being disptsed in the line of said flow of lubricating o1 6. In a rotary machine, the combination of: a' base member having a 4central opening therethrough; a' rotary table; a primary axial bearin rotatabl sup orting said table on sai base; a liold own bracket shaped to form an annular hood substantially covering the exterior openingI between said base and said tablebut permitting a flow o\f lubricating oil from the exterior downwardly between said bracket and said table to said primary axial bearing; means for centering said bracket relative to said base; means for securing said bracket to said base, an oil-tight fit being formed between lsaid bracket and said base; means for forming aesecondary axial bearing between said tableand said bracket opposing said primary axial bearing; and means for forming a radial bearing between said table and said bracketysaid radial bearing and said secondary axial bearing being disposed in the line of said flow lof Llubrllcatin oi1.

7. In a rotary machine, the com ination of: a base member having a central opening therethrough; a rotary table; a primary axial lbearing rotatably Jsup orting said table on said base; `a hold dbwn racket shaped to form an annular hood substantially coveringthe exterior openin between said base -and said table; means or centering said bracket relative to said base; means for securing said bracket to said base; means for forming a secondary axial bearing between said table and said bracket opposing said primary axial bearing; means for forming a primary radial bearing between said table and said bracket; and means for formin a secondary radial bearing between said ta le andsaid base which is' of smaller radius and disposed at a lower level than primary axial bearing.

n a rotary machine, the combination of: a base member having a central opening therethrough; a rotary table; a primary axial bearing rotatably supporting said table on said base; ahold down bracket shaped to form `an annular hood substantially covering the exterior opening between said base and said table but ermitting a low oflubri'cating oil from t e exterior downwardly between said bracket and said table to said primary axial bearin means for eentering said bracket relat1ve to sa'id base; means for securing said bracket to said base, an oil-tight fit being formed between said bracket and said base; means for forming and said bracket @opposing said {primary axial bearing; means for formin a primary radial bearing between said tab e and said bracket, said primary radial bearing beingy saidprimaryl axial bearing lubricating .said

secondary radial bearinfg.

In testimony' whereonwe have hereunto set our hands at. Los geles, California,

vthis 3rd day`of March, 1924. Y

EDWIN` w.I GoEsER.

WILLIAM D, DAVIDSON.

` 65 a secondary axial bearing between said table 

